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Due to historical reasons, the code is in subfolder "1". With SVN removal, we place the code back and remove the annoying "1" folder.
97 lines
3.4 KiB
HTML
97 lines
3.4 KiB
HTML
<!doctype html>
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<title>CodeMirror: Version 2.2 upgrade guide</title>
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<meta charset="utf-8"/>
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<link rel=stylesheet href="docs.css">
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<div id=nav>
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<a href="http://codemirror.net"><img id=logo src="logo.png"></a>
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<ul>
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<li><a href="../index.html">Home</a>
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<li><a href="manual.html">Manual</a>
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<li><a href="https://github.com/marijnh/codemirror">Code</a>
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</ul>
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<ul>
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<li><a class=active href="#">2.2 upgrade guide</a>
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</ul>
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</div>
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<article>
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<h2>Upgrading to v2.2</h2>
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<p>There are a few things in the 2.2 release that require some care
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when upgrading.</p>
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<h3>No more default.css</h3>
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<p>The default theme is now included
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in <a href="../lib/codemirror.css"><code>codemirror.css</code></a>, so
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you do not have to included it separately anymore. (It was tiny, so
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even if you're not using it, the extra data overhead is negligible.)
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<h3>Different key customization</h3>
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<p>CodeMirror has moved to a system
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where <a href="manual.html#option_keyMap">keymaps</a> are used to
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bind behavior to keys. This means <a href="../demo/emacs.html">custom
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bindings</a> are now possible.</p>
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<p>Three options that influenced key
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behavior, <code>tabMode</code>, <code>enterMode</code>,
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and <code>smartHome</code>, are no longer supported. Instead, you can
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provide custom bindings to influence the way these keys act. This is
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done through the
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new <a href="manual.html#option_extraKeys"><code>extraKeys</code></a>
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option, which can hold an object mapping key names to functionality. A
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simple example would be:</p>
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<pre> extraKeys: {
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"Ctrl-S": function(instance) { saveText(instance.getValue()); },
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"Ctrl-/": "undo"
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}</pre>
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<p>Keys can be mapped either to functions, which will be given the
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editor instance as argument, or to strings, which are mapped through
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functions through the <code>CodeMirror.commands</code> table, which
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contains all the built-in editing commands, and can be inspected and
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extended by external code.</p>
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<p>By default, the <code>Home</code> key is bound to
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the <code>"goLineStartSmart"</code> command, which moves the cursor to
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the first non-whitespace character on the line. You can set do this to
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make it always go to the very start instead:</p>
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<pre> extraKeys: {"Home": "goLineStart"}</pre>
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<p>Similarly, <code>Enter</code> is bound
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to <code>"newlineAndIndent"</code> by default. You can bind it to
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something else to get different behavior. To disable special handling
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completely and only get a newline character inserted, you can bind it
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to <code>false</code>:</p>
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<pre> extraKeys: {"Enter": false}</pre>
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<p>The same works for <code>Tab</code>. If you don't want CodeMirror
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to handle it, bind it to <code>false</code>. The default behaviour is
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to indent the current line more (<code>"indentMore"</code> command),
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and indent it less when shift is held (<code>"indentLess"</code>).
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There are also <code>"indentAuto"</code> (smart indent)
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and <code>"insertTab"</code> commands provided for alternate
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behaviors. Or you can write your own handler function to do something
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different altogether.</p>
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<h3>Tabs</h3>
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<p>Handling of tabs changed completely. The display width of tabs can
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now be set with the <code>tabSize</code> option, and tabs can
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be <a href="../demo/visibletabs.html">styled</a> by setting CSS rules
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for the <code>cm-tab</code> class.</p>
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<p>The default width for tabs is now 4, as opposed to the 8 that is
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hard-wired into browsers. If you are relying on 8-space tabs, make
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sure you explicitly set <code>tabSize: 8</code> in your options.</p>
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</article>
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